The Human Body

Colored part of the human eye that controls how much light passes through the pupil.

The outside layer of skin on the human body is called the?

A person passes on ............ different types of bacteria to others when they kiss them.

Your ears are important when it comes to staying balanced.

Women’s hearts beat faster than men’s.

The brain has a memory capacity equivalent to more than _______ terabytes on a hard drive.

The flow of blood through your heart and around your body is called?

The total weight of the bacteria in the human body is ......... kg.

The two holes in your nose are called?

An average human scalp has ........................ hairs.

A fingernail or toenail takes about ................. months to grow from base to tip.

What is the name of the substance that gives skin and hair its pigment?

The shape of DNA is known as?

What substance are nails made of?

By the end of a person’s life, they can recall around _______ trillion pieces of information.

The innermost part of bones contains what?

On average, a person needs ............ minutes to fall asleep.

The two chambers at the bottom of your heart are called ventricles.

The large intestine is also called...

Muscles found in the front of your thighs are known as...

It is impossible to sneeze with your eyes open.

An adult human body has over ..................... bones.

What is the human body’s biggest organ?

What is the name of the biggest part of the human brain?

The bones around your chest that protect organs such as the heart are called what?

Special structures that allow you to experience tastes such as sour, sweet, bitter and salty...

Another name for your voice box is the?

Nerve impulses sent from the brain move at a speed of ______

Name of the long pipe that shifts food from the back of your throat down to your stomach.

We lose 80% of our body heat from the ...............

The bones that make up your spine are called what?